PhoneGap has officially been approved by Apple since 2009. See this blog post. Even when Apple updated their policies by excluding all kinds of frameworks PhoneGap was still permitted.
As explained in this thread there are some limitations if you read the App Store guidelines carefully. Mainly: the app should show a UI if not connected to the internet.
Personally i don't really like the policy of apple. However i don't think that it is that strict as stated in your snippet, otherwise they would have a lot more trouble getting the whole world to addept.
Also have a look at the phonegap website, it shows some examples of which i assume are already available in the appstore.
I think Apple's problem is that you're able to break an Apple installed app this way, also after the app is accepted: I can change the camera widget in my Mendix app without reinstalling the Android app on my phone - stopping and starting the app is enough. This way Apple is not able to do QA on apps loaded on their devices.
I'm afraid that if I'm correct, we're not able to actually develop iOS apps.
I think this is important to get sorted out fast. As we have customers that are very interested in iOS apps, I invested a lot of time sorting things out. I became an Apple developer for $99 a year. If it turns out developing iOS apps with Mendix / Phonegap is not possible after all, it is important for all of us Mendix developers to know that as soon as possible.
=== edit ===
As soon as I have solid information on this matter, I will add that to this thread.
Good news: today I saw an Apple app (iOS) based on a Mendix app! Great, as the iPad is the mobile device used business wise the most.
At the same time, I can't read the Apple policy differently from the way I had and expressed. I will keep this in mind doing my business.